PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-2 Life expectancy: At least 1 year Hematopoietic: WBC at least 2,000/mm3 Absolute neutrophil count at least 1,000/mm3 Platelet count at least 50,000/mm3 Hepatic: Bilirubin no greater than 1.5 mg/dL SGOT or SGPT no greater than 3 times upper limit of normal (ULN) PT or PTT no greater than 1.2 times ULN Renal: Creatinine no greater than 2.0 mg/dL (if stage IIA or IIIA) Creatinine greater than 2.0 mg/dL (if stage IIB or IIIB) Cardiovascular: No myocardial infarction within the past 6 months No congestive heart failure Other: No other prior malignancy within the past 5 years except adequately treated basal cell or squamous cell cancer or carcinoma in situ of the cervix No other disease, psychiatric condition, or substance abuse that would preclude study No serious non-malignant disease, including uncontrolled infection or peptic ulcer disease HIV negative Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception